connect (ui->cRedButton, SIGNAL(toggled(bool)), this, SLOT(_set_color_red(bool)));
connect (ui->cWhiteButton, SIGNAL(toggled(bool)), this, SLOT(_set_color_white(bool)));
connect (ui->cYellowButton, SIGNAL(toggled(bool)), this, SLOT(_set_color_yellow(bool)));
connect (ui->cRedButton, SIGNAL(toggled(bool)), this, SLOT(_set_color_red(bool)));
connect (ui->cWhiteButton, SIGNAL(toggled(bool)), this, SLOT(_set_color_white(bool)));
connect (ui->cYellowButton, SIGNAL(toggled(bool)), this, SLOT(_set_color_yellow(bool)));